Gemini CLI uses Gemini models with a 1M-token context window. GEMINI.md files load as memory, /memory show displays them, and /compress summarizes long chats.
NotebookLM, now Gemini Notebook, allows 50 sources per notebook free and up to 600 on Ultra, each up to 500,000 words or 200MB. Gemini chats: 32K to 1M tokens.
Claude Code's context window is 1M tokens on current models and auto-compacts near 967K. Check usage with /context, summarize with /compact, reset with /clear.
Claude Cowork runs multi-step tasks for you on paid plans. Set global, folder, and project instructions, connect tools, and schedule work with /schedule.